#include <bits/stdc++.h>
typedef long long LL;
using namespace std;
const LL INF = 0x3f3f3f3f;
const LL MAX = 1e4 + 5;
LL n;

int main()
{

    freopen("arena.in", "r", stdin);
    freopen("arena.out", "w", stdout);
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    LL a = pow(n, 2);
    cout << a;
    return 0;
}
